1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_FILE_H_ 6 #define CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_FILE_H_ 7 8 #include "base/compiler_specific.h" 9 #include "base/files/file.h" 10 #include "base/files/file_path.h" 11 #include "base/memory/scoped_ptr.h" 12 #include "base/memory/weak_ptr.h" 13 #include "base/run_loop.h" 14 #include "content/browser/download/download_file.h" 15 #include "content/common/content_export.h" 16 #include "content/public/browser/download_item.h" 17 #include "content/public/browser/download_manager.h" 18 #include "content/public/common/referrer.h" 19 #include "ui/base/dragdrop/download_file_interface.h" 20 #include "url/gurl.h" 21 22 namespace content { 23 24 class DownloadManager; 25 class WebContents; 26 27 // This class implements downloading a file via dragging virtual files out of 28 // the browser: 29 // http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2009-August/022118.html 30 // http://www.html5rocks.com/en/tutorials/casestudies/box_dnd_download/ 31 class CONTENT_EXPORT DragDownloadFile : public ui::DownloadFileProvider { 32 public: 33 // On Windows, we need to download into a temporary file. On posix, we need to 34 // download into a file that has already been created, so only the UI 35 // thread is involved. |file| must be null on windows but non-null on 36 // posix systems. |file_path| is an absolute path on all systems. 37 DragDownloadFile(const base::FilePath& file_path, 38 base::File file, 39 const GURL& url, 40 const Referrer& referrer, 41 const std::string& referrer_encoding, 42 WebContents* web_contents); 43 44 // DownloadFileProvider methods. 45 virtual void Start(ui::DownloadFileObserver* observer) OVERRIDE; 46 virtual bool Wait() OVERRIDE; 47 virtual void Stop() OVERRIDE; 48 49 private: 50 class DragDownloadFileUI; 51 enum State {INITIALIZED, STARTED, SUCCESS, FAILURE}; 52 53 virtual ~DragDownloadFile(); 54 55 void DownloadCompleted(bool is_successful); 56 void CheckThread(); 57 58 base::FilePath file_path_; 59 base::File file_; 60 base::MessageLoop* drag_message_loop_; 61 State state_; 62 scoped_refptr<ui::DownloadFileObserver> observer_; 63 base::RunLoop nested_loop_; 64 DragDownloadFileUI* drag_ui_; 65 base::WeakPtrFactory<DragDownloadFile> weak_ptr_factory_; 66 67 DISALLOW_COPY_AND_ASSIGN(DragDownloadFile); 68 }; 69 70 } // namespace content 71 72 #endif // CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_FILE_H_ 73